| //=-- asan_str_test.cc ----------------------------------------------------===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // This file is a part of AddressSanitizer, an address sanity checker. |
| // |
| //===----------------------------------------------------------------------===// |
| #include "asan_test_utils.h" |
| |
| #if defined(__APPLE__) |
| #include <AvailabilityMacros.h> // For MAC_OS_X_VERSION_* |
| #endif |
| |
| // Used for string functions tests |
| static char global_string[] = "global"; |
| static size_t global_string_length = 6; |
| |
| // Input to a test is a zero-terminated string str with given length |
| // Accesses to the bytes to the left and to the right of str |
| // are presumed to produce OOB errors |
| void StrLenOOBTestTemplate(char *str, size_t length, bool is_global) { |
| // Normal strlen calls |
| EXPECT_EQ(strlen(str), length); |
| if (length > 0) { |
| EXPECT_EQ(length - 1, strlen(str + 1)); |
| EXPECT_EQ(0U, strlen(str + length)); |
| } |
| // Arg of strlen is not malloced, OOB access |
| if (!is_global) { |
| // We don't insert RedZones to the left of global variables |
| EXPECT_DEATH(Ident(strlen(str - 1)), LeftOOBReadMessage(1)); |
| EXPECT_DEATH(Ident(strlen(str - 5)), LeftOOBReadMessage(5)); |
| } |
| EXPECT_DEATH(Ident(strlen(str + length + 1)), RightOOBReadMessage(0)); |
| // Overwrite terminator |
| str[length] = 'a'; |
| // String is not zero-terminated, strlen will lead to OOB access |
| EXPECT_DEATH(Ident(strlen(str)), RightOOBReadMessage(0)); |
| EXPECT_DEATH(Ident(strlen(str + length)), RightOOBReadMessage(0)); |
| // Restore terminator |
| str[length] = 0; |
| } |
| TEST(AddressSanitizer, StrLenOOBTest) { |
| // Check heap-allocated string |
| size_t length = Ident(10); |
| char *heap_string = Ident((char*)malloc(length + 1)); |
| char stack_string[10 + 1]; |
| break_optimization(&stack_string); |
| for (size_t i = 0; i < length; i++) { |
| heap_string[i] = 'a'; |
| stack_string[i] = 'b'; |
| } |
| heap_string[length] = 0; |
| stack_string[length] = 0; |
| StrLenOOBTestTemplate(heap_string, length, false); |
| // TODO(samsonov): Fix expected messages in StrLenOOBTestTemplate to |
| // make test for stack_string work. Or move it to output tests. |
| // StrLenOOBTestTemplate(stack_string, length, false); |
| StrLenOOBTestTemplate(global_string, global_string_length, true); |
| free(heap_string); |
| } |
| |
| TEST(AddressSanitizer, WcsLenTest) { |
| EXPECT_EQ(0U, wcslen(Ident(L""))); |
| size_t hello_len = 13; |
| size_t hello_size = (hello_len + 1) * sizeof(wchar_t); |
| EXPECT_EQ(hello_len, wcslen(Ident(L"Hello, World!"))); |
| wchar_t *heap_string = Ident((wchar_t*)malloc(hello_size)); |
| memcpy(heap_string, L"Hello, World!", hello_size); |
| EXPECT_EQ(hello_len, Ident(wcslen(heap_string))); |
| EXPECT_DEATH(Ident(wcslen(heap_string + 14)), RightOOBReadMessage(0)); |
| free(heap_string); |
| } |
| |
| #ifndef __APPLE__ |
| TEST(AddressSanitizer, StrNLenOOBTest) { |
| size_t size = Ident(123); |
| char *str = MallocAndMemsetString(size); |
| // Normal strnlen calls. |
| Ident(strnlen(str - 1, 0)); |
| Ident(strnlen(str, size)); |
| Ident(strnlen(str + size - 1, 1)); |
| str[size - 1] = '\0'; |
| Ident(strnlen(str, 2 * size)); |
| // Argument points to not allocated memory. |
| EXPECT_DEATH(Ident(strnlen(str - 1, 1)), LeftOOBReadMessage(1)); |
| EXPECT_DEATH(Ident(strnlen(str + size, 1)), RightOOBReadMessage(0)); |
| // Overwrite the terminating '\0' and hit unallocated memory. |
| str[size - 1] = 'z'; |
| EXPECT_DEATH(Ident(strnlen(str, size + 1)), RightOOBReadMessage(0)); |
| free(str); |
| } |
| #endif |
| |
| TEST(AddressSanitizer, StrDupOOBTest) { |
| size_t size = Ident(42); |
| char *str = MallocAndMemsetString(size); |
| char *new_str; |
| // Normal strdup calls. |
| str[size - 1] = '\0'; |
| new_str = strdup(str); |
| free(new_str); |
| new_str = strdup(str + size - 1); |
| free(new_str); |
| // Argument points to not allocated memory. |
| EXPECT_DEATH(Ident(strdup(str - 1)), LeftOOBReadMessage(1)); |
| EXPECT_DEATH(Ident(strdup(str + size)), RightOOBReadMessage(0)); |
| // Overwrite the terminating '\0' and hit unallocated memory. |
| str[size - 1] = 'z'; |
| EXPECT_DEATH(Ident(strdup(str)), RightOOBReadMessage(0)); |
| free(str); |
| } |
| |
| TEST(AddressSanitizer, StrCpyOOBTest) { |
| size_t to_size = Ident(30); |
| size_t from_size = Ident(6); // less than to_size |
| char *to = Ident((char*)malloc(to_size)); |
| char *from = Ident((char*)malloc(from_size)); |
| // Normal strcpy calls. |
| strcpy(from, "hello"); |
| strcpy(to, from); |
| strcpy(to + to_size - from_size, from); |
| // Length of "from" is too small. |
| EXPECT_DEATH(Ident(strcpy(from, "hello2")), RightOOBWriteMessage(0)); |
| // "to" or "from" points to not allocated memory. |
| EXPECT_DEATH(Ident(strcpy(to - 1, from)), LeftOOBWriteMessage(1)); |
| EXPECT_DEATH(Ident(strcpy(to, from - 1)), LeftOOBReadMessage(1)); |
| EXPECT_DEATH(Ident(strcpy(to, from + from_size)), RightOOBReadMessage(0)); |
| EXPECT_DEATH(Ident(strcpy(to + to_size, from)), RightOOBWriteMessage(0)); |
| // Overwrite the terminating '\0' character and hit unallocated memory. |
| from[from_size - 1] = '!'; |
| EXPECT_DEATH(Ident(strcpy(to, from)), RightOOBReadMessage(0)); |
| free(to); |
| free(from); |
| } |
| |
| TEST(AddressSanitizer, StrNCpyOOBTest) { |
| size_t to_size = Ident(20); |
| size_t from_size = Ident(6); // less than to_size |
| char *to = Ident((char*)malloc(to_size)); |
| // From is a zero-terminated string "hello\0" of length 6 |
| char *from = Ident((char*)malloc(from_size)); |
| strcpy(from, "hello"); |
| // copy 0 bytes |
| strncpy(to, from, 0); |
| strncpy(to - 1, from - 1, 0); |
| // normal strncpy calls |
| strncpy(to, from, from_size); |
| strncpy(to, from, to_size); |
| strncpy(to, from + from_size - 1, to_size); |
| strncpy(to + to_size - 1, from, 1); |
| // One of {to, from} points to not allocated memory |
| EXPECT_DEATH(Ident(strncpy(to, from - 1, from_size)), |
| LeftOOBReadMessage(1)); |
| EXPECT_DEATH(Ident(strncpy(to - 1, from, from_size)), |
| LeftOOBWriteMessage(1)); |
| EXPECT_DEATH(Ident(strncpy(to, from + from_size, 1)), |
| RightOOBReadMessage(0)); |
| EXPECT_DEATH(Ident(strncpy(to + to_size, from, 1)), |
| RightOOBWriteMessage(0)); |
| // Length of "to" is too small |
| EXPECT_DEATH(Ident(strncpy(to + to_size - from_size + 1, from, from_size)), |
| RightOOBWriteMessage(0)); |
| EXPECT_DEATH(Ident(strncpy(to + 1, from, to_size)), |
| RightOOBWriteMessage(0)); |
| // Overwrite terminator in from |
| from[from_size - 1] = '!'; |
| // normal strncpy call |
| strncpy(to, from, from_size); |
| // Length of "from" is too small |
| EXPECT_DEATH(Ident(strncpy(to, from, to_size)), |
| RightOOBReadMessage(0)); |
| free(to); |
| free(from); |
| } |
| |
| // Users may have different definitions of "strchr" and "index", so provide |
| // function pointer typedefs and overload RunStrChrTest implementation. |
| // We can't use macro for RunStrChrTest body here, as this macro would |
| // confuse EXPECT_DEATH gtest macro. |
| typedef char*(*PointerToStrChr1)(const char*, int); |
| typedef char*(*PointerToStrChr2)(char*, int); |
| |
| USED static void RunStrChrTest(PointerToStrChr1 StrChr) { |
| size_t size = Ident(100); |
| char *str = MallocAndMemsetString(size); |
| str[10] = 'q'; |
| str[11] = '\0'; |
| EXPECT_EQ(str, StrChr(str, 'z')); |
| EXPECT_EQ(str + 10, StrChr(str, 'q')); |
| EXPECT_EQ(NULL, StrChr(str, 'a')); |
| // StrChr argument points to not allocated memory. |
| EXPECT_DEATH(Ident(StrChr(str - 1, 'z')), LeftOOBReadMessage(1)); |
| EXPECT_DEATH(Ident(StrChr(str + size, 'z')), RightOOBReadMessage(0)); |
| // Overwrite the terminator and hit not allocated memory. |
| str[11] = 'z'; |
| EXPECT_DEATH(Ident(StrChr(str, 'a')), RightOOBReadMessage(0)); |
| free(str); |
| } |
| USED static void RunStrChrTest(PointerToStrChr2 StrChr) { |
| size_t size = Ident(100); |
| char *str = MallocAndMemsetString(size); |
| str[10] = 'q'; |
| str[11] = '\0'; |
| EXPECT_EQ(str, StrChr(str, 'z')); |
| EXPECT_EQ(str + 10, StrChr(str, 'q')); |
| EXPECT_EQ(NULL, StrChr(str, 'a')); |
| // StrChr argument points to not allocated memory. |
| EXPECT_DEATH(Ident(StrChr(str - 1, 'z')), LeftOOBReadMessage(1)); |
| EXPECT_DEATH(Ident(StrChr(str + size, 'z')), RightOOBReadMessage(0)); |
| // Overwrite the terminator and hit not allocated memory. |
| str[11] = 'z'; |
| EXPECT_DEATH(Ident(StrChr(str, 'a')), RightOOBReadMessage(0)); |
| free(str); |
| } |
| |
| TEST(AddressSanitizer, StrChrAndIndexOOBTest) { |
| RunStrChrTest(&strchr); |
| RunStrChrTest(&index); |
| } |
| |
| TEST(AddressSanitizer, StrCmpAndFriendsLogicTest) { |
| // strcmp |
| EXPECT_EQ(0, strcmp("", "")); |
| EXPECT_EQ(0, strcmp("abcd", "abcd")); |
| EXPECT_GT(0, strcmp("ab", "ac")); |
| EXPECT_GT(0, strcmp("abc", "abcd")); |
| EXPECT_LT(0, strcmp("acc", "abc")); |
| EXPECT_LT(0, strcmp("abcd", "abc")); |
| |
| // strncmp |
| EXPECT_EQ(0, strncmp("a", "b", 0)); |
| EXPECT_EQ(0, strncmp("abcd", "abcd", 10)); |
| EXPECT_EQ(0, strncmp("abcd", "abcef", 3)); |
| EXPECT_GT(0, strncmp("abcde", "abcfa", 4)); |
| EXPECT_GT(0, strncmp("a", "b", 5)); |
| EXPECT_GT(0, strncmp("bc", "bcde", 4)); |
| EXPECT_LT(0, strncmp("xyz", "xyy", 10)); |
| EXPECT_LT(0, strncmp("baa", "aaa", 1)); |
| EXPECT_LT(0, strncmp("zyx", "", 2)); |
| |
| // strcasecmp |
| EXPECT_EQ(0, strcasecmp("", "")); |
| EXPECT_EQ(0, strcasecmp("zzz", "zzz")); |
| EXPECT_EQ(0, strcasecmp("abCD", "ABcd")); |
| EXPECT_GT(0, strcasecmp("aB", "Ac")); |
| EXPECT_GT(0, strcasecmp("ABC", "ABCd")); |
| EXPECT_LT(0, strcasecmp("acc", "abc")); |
| EXPECT_LT(0, strcasecmp("ABCd", "abc")); |
| |
| // strncasecmp |
| EXPECT_EQ(0, strncasecmp("a", "b", 0)); |
| EXPECT_EQ(0, strncasecmp("abCD", "ABcd", 10)); |
| EXPECT_EQ(0, strncasecmp("abCd", "ABcef", 3)); |
| EXPECT_GT(0, strncasecmp("abcde", "ABCfa", 4)); |
| EXPECT_GT(0, strncasecmp("a", "B", 5)); |
| EXPECT_GT(0, strncasecmp("bc", "BCde", 4)); |
| EXPECT_LT(0, strncasecmp("xyz", "xyy", 10)); |
| EXPECT_LT(0, strncasecmp("Baa", "aaa", 1)); |
| EXPECT_LT(0, strncasecmp("zyx", "", 2)); |
| |
| // memcmp |
| EXPECT_EQ(0, memcmp("a", "b", 0)); |
| EXPECT_EQ(0, memcmp("ab\0c", "ab\0c", 4)); |
| EXPECT_GT(0, memcmp("\0ab", "\0ac", 3)); |
| EXPECT_GT(0, memcmp("abb\0", "abba", 4)); |
| EXPECT_LT(0, memcmp("ab\0cd", "ab\0c\0", 5)); |
| EXPECT_LT(0, memcmp("zza", "zyx", 3)); |
| } |
| |
| typedef int(*PointerToStrCmp)(const char*, const char*); |
| void RunStrCmpTest(PointerToStrCmp StrCmp) { |
| size_t size = Ident(100); |
| int fill = 'o'; |
| char *s1 = MallocAndMemsetString(size, fill); |
| char *s2 = MallocAndMemsetString(size, fill); |
| s1[size - 1] = '\0'; |
| s2[size - 1] = '\0'; |
| // Normal StrCmp calls |
| Ident(StrCmp(s1, s2)); |
| Ident(StrCmp(s1, s2 + size - 1)); |
| Ident(StrCmp(s1 + size - 1, s2 + size - 1)); |
| s1[size - 1] = 'z'; |
| s2[size - 1] = 'x'; |
| Ident(StrCmp(s1, s2)); |
| // One of arguments points to not allocated memory. |
| EXPECT_DEATH(Ident(StrCmp)(s1 - 1, s2), LeftOOBReadMessage(1)); |
| EXPECT_DEATH(Ident(StrCmp)(s1, s2 - 1), LeftOOBReadMessage(1)); |
| EXPECT_DEATH(Ident(StrCmp)(s1 + size, s2), RightOOBReadMessage(0)); |
| EXPECT_DEATH(Ident(StrCmp)(s1, s2 + size), RightOOBReadMessage(0)); |
| // Hit unallocated memory and die. |
| s1[size - 1] = fill; |
| EXPECT_DEATH(Ident(StrCmp)(s1, s1), RightOOBReadMessage(0)); |
| EXPECT_DEATH(Ident(StrCmp)(s1 + size - 1, s2), RightOOBReadMessage(0)); |
| free(s1); |
| free(s2); |
| } |
| |
| TEST(AddressSanitizer, StrCmpOOBTest) { |
| RunStrCmpTest(&strcmp); |
| } |
| |
| TEST(AddressSanitizer, StrCaseCmpOOBTest) { |
| RunStrCmpTest(&strcasecmp); |
| } |
| |
| typedef int(*PointerToStrNCmp)(const char*, const char*, size_t); |
| void RunStrNCmpTest(PointerToStrNCmp StrNCmp) { |
| size_t size = Ident(100); |
| char *s1 = MallocAndMemsetString(size); |
| char *s2 = MallocAndMemsetString(size); |
| s1[size - 1] = '\0'; |
| s2[size - 1] = '\0'; |
| // Normal StrNCmp calls |
| Ident(StrNCmp(s1, s2, size + 2)); |
| s1[size - 1] = 'z'; |
| s2[size - 1] = 'x'; |
| Ident(StrNCmp(s1 + size - 2, s2 + size - 2, size)); |
| s2[size - 1] = 'z'; |
| Ident(StrNCmp(s1 - 1, s2 - 1, 0)); |
| Ident(StrNCmp(s1 + size - 1, s2 + size - 1, 1)); |
| // One of arguments points to not allocated memory. |
| EXPECT_DEATH(Ident(StrNCmp)(s1 - 1, s2, 1), LeftOOBReadMessage(1)); |
| EXPECT_DEATH(Ident(StrNCmp)(s1, s2 - 1, 1), LeftOOBReadMessage(1)); |
| EXPECT_DEATH(Ident(StrNCmp)(s1 + size, s2, 1), RightOOBReadMessage(0)); |
| EXPECT_DEATH(Ident(StrNCmp)(s1, s2 + size, 1), RightOOBReadMessage(0)); |
| // Hit unallocated memory and die. |
| EXPECT_DEATH(Ident(StrNCmp)(s1 + 1, s2 + 1, size), RightOOBReadMessage(0)); |
| EXPECT_DEATH(Ident(StrNCmp)(s1 + size - 1, s2, 2), RightOOBReadMessage(0)); |
| free(s1); |
| free(s2); |
| } |
| |
| TEST(AddressSanitizer, StrNCmpOOBTest) { |
| RunStrNCmpTest(&strncmp); |
| } |
| |
| TEST(AddressSanitizer, StrNCaseCmpOOBTest) { |
| RunStrNCmpTest(&strncasecmp); |
| } |
| TEST(AddressSanitizer, StrCatOOBTest) { |
| // strcat() reads strlen(to) bytes from |to| before concatenating. |
| size_t to_size = Ident(100); |
| char *to = MallocAndMemsetString(to_size); |
| to[0] = '\0'; |
| size_t from_size = Ident(20); |
| char *from = MallocAndMemsetString(from_size); |
| from[from_size - 1] = '\0'; |
| // Normal strcat calls. |
| strcat(to, from); |
| strcat(to, from); |
| strcat(to + from_size, from + from_size - 2); |
| // Passing an invalid pointer is an error even when concatenating an empty |
| // string. |
| EXPECT_DEATH(strcat(to - 1, from + from_size - 1), LeftOOBAccessMessage(1)); |
| // One of arguments points to not allocated memory. |
| EXPECT_DEATH(strcat(to - 1, from), LeftOOBAccessMessage(1)); |
| EXPECT_DEATH(strcat(to, from - 1), LeftOOBReadMessage(1)); |
| EXPECT_DEATH(strcat(to + to_size, from), RightOOBWriteMessage(0)); |
| EXPECT_DEATH(strcat(to, from + from_size), RightOOBReadMessage(0)); |
| |
| // "from" is not zero-terminated. |
| from[from_size - 1] = 'z'; |
| EXPECT_DEATH(strcat(to, from), RightOOBReadMessage(0)); |
| from[from_size - 1] = '\0'; |
| // "to" is not zero-terminated. |
| memset(to, 'z', to_size); |
| EXPECT_DEATH(strcat(to, from), RightOOBWriteMessage(0)); |
| // "to" is too short to fit "from". |
| to[to_size - from_size + 1] = '\0'; |
| EXPECT_DEATH(strcat(to, from), RightOOBWriteMessage(0)); |
| // length of "to" is just enough. |
| strcat(to, from + 1); |
| |
| free(to); |
| free(from); |
| } |
| |
| TEST(AddressSanitizer, StrNCatOOBTest) { |
| // strncat() reads strlen(to) bytes from |to| before concatenating. |
| size_t to_size = Ident(100); |
| char *to = MallocAndMemsetString(to_size); |
| to[0] = '\0'; |
| size_t from_size = Ident(20); |
| char *from = MallocAndMemsetString(from_size); |
| // Normal strncat calls. |
| strncat(to, from, 0); |
| strncat(to, from, from_size); |
| from[from_size - 1] = '\0'; |
| strncat(to, from, 2 * from_size); |
| // Catenating empty string with an invalid string is still an error. |
| EXPECT_DEATH(strncat(to - 1, from, 0), LeftOOBAccessMessage(1)); |
| strncat(to, from + from_size - 1, 10); |
| // One of arguments points to not allocated memory. |
| EXPECT_DEATH(strncat(to - 1, from, 2), LeftOOBAccessMessage(1)); |
| EXPECT_DEATH(strncat(to, from - 1, 2), LeftOOBReadMessage(1)); |
| EXPECT_DEATH(strncat(to + to_size, from, 2), RightOOBWriteMessage(0)); |
| EXPECT_DEATH(strncat(to, from + from_size, 2), RightOOBReadMessage(0)); |
| |
| memset(from, 'z', from_size); |
| memset(to, 'z', to_size); |
| to[0] = '\0'; |
| // "from" is too short. |
| EXPECT_DEATH(strncat(to, from, from_size + 1), RightOOBReadMessage(0)); |
| // "to" is not zero-terminated. |
| EXPECT_DEATH(strncat(to + 1, from, 1), RightOOBWriteMessage(0)); |
| // "to" is too short to fit "from". |
| to[0] = 'z'; |
| to[to_size - from_size + 1] = '\0'; |
| EXPECT_DEATH(strncat(to, from, from_size - 1), RightOOBWriteMessage(0)); |
| // "to" is just enough. |
| strncat(to, from, from_size - 2); |
| |
| free(to); |
| free(from); |
| } |
| |
| static string OverlapErrorMessage(const string &func) { |
| return func + "-param-overlap"; |
| } |
| |
| TEST(AddressSanitizer, StrArgsOverlapTest) { |
| size_t size = Ident(100); |
| char *str = Ident((char*)malloc(size)); |
| |
| // Do not check memcpy() on OS X 10.7 and later, where it actually aliases |
| // memmove(). |
| #if !defined(__APPLE__) || !defined(MAC_OS_X_VERSION_10_7) || \ |
| (MAC_OS_X_VERSION_MAX_ALLOWED < MAC_OS_X_VERSION_10_7) |
| // Check "memcpy". Use Ident() to avoid inlining. |
| memset(str, 'z', size); |
| Ident(memcpy)(str + 1, str + 11, 10); |
| Ident(memcpy)(str, str, 0); |
| EXPECT_DEATH(Ident(memcpy)(str, str + 14, 15), OverlapErrorMessage("memcpy")); |
| EXPECT_DEATH(Ident(memcpy)(str + 14, str, 15), OverlapErrorMessage("memcpy")); |
| #endif |
| |
| // We do not treat memcpy with to==from as a bug. |
| // See http://llvm.org/bugs/show_bug.cgi?id=11763. |
| // EXPECT_DEATH(Ident(memcpy)(str + 20, str + 20, 1), |
| // OverlapErrorMessage("memcpy")); |
| |
| // Check "strcpy". |
| memset(str, 'z', size); |
| str[9] = '\0'; |
| strcpy(str + 10, str); |
| EXPECT_DEATH(strcpy(str + 9, str), OverlapErrorMessage("strcpy")); |
| EXPECT_DEATH(strcpy(str, str + 4), OverlapErrorMessage("strcpy")); |
| strcpy(str, str + 5); |
| |
| // Check "strncpy". |
| memset(str, 'z', size); |
| strncpy(str, str + 10, 10); |
| EXPECT_DEATH(strncpy(str, str + 9, 10), OverlapErrorMessage("strncpy")); |
| EXPECT_DEATH(strncpy(str + 9, str, 10), OverlapErrorMessage("strncpy")); |
| str[10] = '\0'; |
| strncpy(str + 11, str, 20); |
| EXPECT_DEATH(strncpy(str + 10, str, 20), OverlapErrorMessage("strncpy")); |
| |
| // Check "strcat". |
| memset(str, 'z', size); |
| str[10] = '\0'; |
| str[20] = '\0'; |
| strcat(str, str + 10); |
| EXPECT_DEATH(strcat(str, str + 11), OverlapErrorMessage("strcat")); |
| str[10] = '\0'; |
| strcat(str + 11, str); |
| EXPECT_DEATH(strcat(str, str + 9), OverlapErrorMessage("strcat")); |
| EXPECT_DEATH(strcat(str + 9, str), OverlapErrorMessage("strcat")); |
| EXPECT_DEATH(strcat(str + 10, str), OverlapErrorMessage("strcat")); |
| |
| // Check "strncat". |
| memset(str, 'z', size); |
| str[10] = '\0'; |
| strncat(str, str + 10, 10); // from is empty |
| EXPECT_DEATH(strncat(str, str + 11, 10), OverlapErrorMessage("strncat")); |
| str[10] = '\0'; |
| str[20] = '\0'; |
| strncat(str + 5, str, 5); |
| str[10] = '\0'; |
| EXPECT_DEATH(strncat(str + 5, str, 6), OverlapErrorMessage("strncat")); |
| EXPECT_DEATH(strncat(str, str + 9, 10), OverlapErrorMessage("strncat")); |
| |
| free(str); |
| } |
| |
| void CallAtoi(const char *nptr) { |
| Ident(atoi(nptr)); |
| } |
| void CallAtol(const char *nptr) { |
| Ident(atol(nptr)); |
| } |
| void CallAtoll(const char *nptr) { |
| Ident(atoll(nptr)); |
| } |
| typedef void(*PointerToCallAtoi)(const char*); |
| |
| void RunAtoiOOBTest(PointerToCallAtoi Atoi) { |
| char *array = MallocAndMemsetString(10, '1'); |
| // Invalid pointer to the string. |
| EXPECT_DEATH(Atoi(array + 11), RightOOBReadMessage(1)); |
| EXPECT_DEATH(Atoi(array - 1), LeftOOBReadMessage(1)); |
| // Die if a buffer doesn't have terminating NULL. |
| EXPECT_DEATH(Atoi(array), RightOOBReadMessage(0)); |
| // Make last symbol a terminating NULL or other non-digit. |
| array[9] = '\0'; |
| Atoi(array); |
| array[9] = 'a'; |
| Atoi(array); |
| Atoi(array + 9); |
| // Sometimes we need to detect overflow if no digits are found. |
| memset(array, ' ', 10); |
| EXPECT_DEATH(Atoi(array), RightOOBReadMessage(0)); |
| array[9] = '-'; |
| EXPECT_DEATH(Atoi(array), RightOOBReadMessage(0)); |
| EXPECT_DEATH(Atoi(array + 9), RightOOBReadMessage(0)); |
| array[8] = '-'; |
| Atoi(array); |
| free(array); |
| } |
| |
| TEST(AddressSanitizer, AtoiAndFriendsOOBTest) { |
| RunAtoiOOBTest(&CallAtoi); |
| RunAtoiOOBTest(&CallAtol); |
| RunAtoiOOBTest(&CallAtoll); |
| } |
| |
| void CallStrtol(const char *nptr, char **endptr, int base) { |
| Ident(strtol(nptr, endptr, base)); |
| } |
| void CallStrtoll(const char *nptr, char **endptr, int base) { |
| Ident(strtoll(nptr, endptr, base)); |
| } |
| typedef void(*PointerToCallStrtol)(const char*, char**, int); |
| |
| void RunStrtolOOBTest(PointerToCallStrtol Strtol) { |
| char *array = MallocAndMemsetString(3); |
| char *endptr = NULL; |
| array[0] = '1'; |
| array[1] = '2'; |
| array[2] = '3'; |
| // Invalid pointer to the string. |
| EXPECT_DEATH(Strtol(array + 3, NULL, 0), RightOOBReadMessage(0)); |
| EXPECT_DEATH(Strtol(array - 1, NULL, 0), LeftOOBReadMessage(1)); |
| // Buffer overflow if there is no terminating null (depends on base). |
| Strtol(array, &endptr, 3); |
| EXPECT_EQ(array + 2, endptr); |
| EXPECT_DEATH(Strtol(array, NULL, 0), RightOOBReadMessage(0)); |
| array[2] = 'z'; |
| Strtol(array, &endptr, 35); |
| EXPECT_EQ(array + 2, endptr); |
| EXPECT_DEATH(Strtol(array, NULL, 36), RightOOBReadMessage(0)); |
| // Add terminating zero to get rid of overflow. |
| array[2] = '\0'; |
| Strtol(array, NULL, 36); |
| // Don't check for overflow if base is invalid. |
| Strtol(array - 1, NULL, -1); |
| Strtol(array + 3, NULL, 1); |
| // Sometimes we need to detect overflow if no digits are found. |
| array[0] = array[1] = array[2] = ' '; |
| EXPECT_DEATH(Strtol(array, NULL, 0), RightOOBReadMessage(0)); |
| array[2] = '+'; |
| EXPECT_DEATH(Strtol(array, NULL, 0), RightOOBReadMessage(0)); |
| array[2] = '-'; |
| EXPECT_DEATH(Strtol(array, NULL, 0), RightOOBReadMessage(0)); |
| array[1] = '+'; |
| Strtol(array, NULL, 0); |
| array[1] = array[2] = 'z'; |
| Strtol(array, &endptr, 0); |
| EXPECT_EQ(array, endptr); |
| Strtol(array + 2, NULL, 0); |
| EXPECT_EQ(array, endptr); |
| free(array); |
| } |
| |
| TEST(AddressSanitizer, StrtollOOBTest) { |
| RunStrtolOOBTest(&CallStrtoll); |
| } |
| TEST(AddressSanitizer, StrtolOOBTest) { |
| RunStrtolOOBTest(&CallStrtol); |
| } |
| |
| |